CN205259175U - Lower part enlarges compound foundation pile of diameter section - Google Patents
Lower part enlarges compound foundation pile of diameter section Download PDFInfo
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- CN205259175U CN205259175U CN201520851596.6U CN201520851596U CN205259175U CN 205259175 U CN205259175 U CN 205259175U CN 201520851596 U CN201520851596 U CN 201520851596U CN 205259175 U CN205259175 U CN 205259175U
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Abstract
The utility model provides a lower part enlarges compound foundation pile of diameter section, should compound the foundation pile and include the precast concrete pile body, the lower part outside of the precast concrete pile body is equipped with the bored concrete pile. The utility model discloses a lower part enlarges the section pile foundation to be compared with the pile body of single diameter with length, and its pile foundation bearing capacity improves a lot, can guarantee that the stake is long shorter under the prerequisite that satisfies the requirement of design bearing capacity, and improves the pile foundation side and hinder and hold the performance ability that hinders.
Description
Technical field
The utility model belongs to foundation engineering technical field, is specifically related to a kind of bottom enlarged diameter section composite foundation pile.
Background technology
Along with the development of building trade, construction scope increases day by day, and the additional load of ground is increasing,, high-rise building high-rise for part, subsoil and composite foundation can not meet ground requirement for bearing capacity, and under this condition, pile foundation is a kind of base form generally adopting. While there is the soft layers such as super thick miscellaneous fill, weak soil, liquefying soil and collapsible soil for top, some areas bases, pile foundation is general adopts the negative friction that adds timber pile length and offset soft layer, and a stake type generally adopts cast-in-situ bored pile. Bored pile construction operation is:
(1) plant equipment and material enter job site;
(2) measure of pile position setting-out;
(3) bury casing underground;
(4) the in place and pore-forming of rig;
(5) clear hole, lifting steel reinforcement cage;
(6) conduit, concrete perfusion are installed;
(7) remove casing, cut pile crown;
(8) pile body detects.
Generally use although above-mentioned technique is existing, in thicker soft layer, use the following problem that still exists:
1) exist on top thicklyer banket, when the soil layer such as weak soil, the negative friction that its consolidation settlement produces produces considerable influence to bearing capacity of pile foundation. When pile foundation size design, need to deduct the impact of negative friction, stake footpath, stake appearance should increase, and cause waste.
2) filling pile construction has higher requirements to filling concrete process, and filling process should ensure continuously, otherwise be prone to pile breaking phenomenon.
Summary of the invention
The purpose of this utility model has been to provide a kind of easily bottom enlarged diameter section composite foundation pile of generation negative friction soil layer such as the thicker miscellaneous fill in top, weak soil, collapsible soil and liquefiable soil layer that is applicable to.
Based on above-mentioned purpose, the utility model is taked following technical scheme: a kind of bottom enlarged diameter section composite foundation pile, comprise precast concrete pile body, and the lower outside of described precast concrete pile body is provided with bored concrete pile.
Described bored concrete pile comprises cylindrical circular stake body and the conic tube being connected with stake body top, the equal diameters of the bottom surface diameter of conic tube and stake body, and stake body and conic tube are integrative-structure, and the bus of conic tube and the angle of center line are not more than 12 °.
The top of described bored concrete pile, the outside of precast concrete pile body are provided with Friction-Reducing Coating, weaken the coating of negative friction, negative friction composite foundation pile being produced for reducing weak soil layer.
Described precast concrete pile body is pile for prestressed pipe or square pile, the preferred PHC pile tube of pile for prestressed pipe or PRC pile tube.
The curing materials of described bored concrete pile is one or more in cement mortar, cement mortar, soil cement, concrete and grouting material.
Sharpest edges of the present utility model are: under aforementioned soil layer condition, compared with the pile body of the single diameter of same length, the bearing capacity of pile foundation of composite pile foundation of the present invention is higher, and, meet under the prerequisite of design bearing capacity requirement in guarantee, realize stake long shorter, the capability development of pile foundation side resistance simultaneously and end resistance is higher, is particularly suited for being applied to the thicker miscellaneous fill in top, weak soil, collapsible soil and liquefiable soil layer etc. and easily produces negative friction soil layer. Compared with prior art, this uses novel technique effect to be specially:
1) composite foundation pile adopts the bored concrete pile in precast concrete pile body and outside, its underpart to be composited, the precast concrete pile body wherein adopting is prefabricated components, after insertion without taking-up, man-hour can significantly be shortened, bored concrete pile and the precast concrete pile body in outside, its underpart are combined closely, composite foundation pile entirety presents the large version in stake footpath, Zhuan Jing little bottom, top, can better play the effect that increases bottom pile bearing capacity;
2) filling pile structure adopts the version of cylindrical circular stake body and the conic tube being connected with stake body top, make to form between composite foundation pile top and bottom the transition of taper nature, the performance that be conducive to reduce top pile-side negative friction, increases bottom pile bearing capacity, also saves bored concrete pile material simultaneously;
3) be provided with Friction-Reducing Coating at the external wall of precast concrete pile, its object can effectively reduce negative friction, thereby further reduces top pile-side negative friction, increase pile bearing capacity;
4) while construction, method is simple, feasibility is high, and the soil layer below soft layer carries out mechanical hole reaming, can ensure that stake footpath is less within the scope of soft layer, for the formation of composite foundation pile is laid a solid foundation; In addition, produce before intensity at the curing materials of perfusion, adopt inserted mode construction to implant precast concrete pile body, this is compared with prefabricated pile of field by using static pressure, hammering construction, the former intensity is higher, and is not easy to occur because being pressed into, squeezing into phenomenons such as producing cracking, damage.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model construction procedure (1);
Fig. 3 is the structural representation of the utility model construction procedure (2);
Fig. 4 is the structural representation of the utility model construction procedure (3);
Fig. 5 is the structural representation of the utility model construction procedure (4).
Detailed description of the invention
A kind of bottom enlarged diameter section composite foundation pile as shown in Figure 1, comprises precast concrete pile body 1, and precast concrete pile body is PHC pile tube. Precast concrete pile body 1 top is positioned at weak soil layer 4, and bottom is positioned at better soil layer 5, and the outside that the bottom of precast concrete pile body 1 is positioned at better soil layer 5 is provided with bored concrete pile 3. Bored concrete pile 3 comprises cylindrical circular stake body 31 and the conic tube 31 being connected with stake body 32 tops, the equal diameters of the bottom surface diameter of conic tube 31 and stake body 32, and stake body 32 and conic tube 31 are integrative-structure, and the bus of conic tube 31 and the angle of center line are 12 °. The top of bored concrete pile 3, the outside of precast concrete pile body 1 are provided with Friction-Reducing Coating 2.
Its construction method, comprises the following steps:
(1) rig pore-forming or manual pore-forming, aperture 800mm, as shown in Figure 2;
(2) below 4, better in soil layer 5 scopes, carry out mechanical hole reaming at soft layer, as shown in Figure 3; Soft layer 4 is in miscellaneous fill, weak soil, collapsible soil or liquefiable soil layer; Reaming aperture is 1200mm, and when reaming construction, the angle between hole wall and the axis in hole of aperture increase section is not more than 12 °;
(3) in hole, pour into curing materials, as shown in Figure 4, curing materials is concrete, can also be cement mortar, cement mortar, soil cement or grouting material;
(4) produce before intensity at the curing materials of step (3) perfusion, implant precast concrete pile body; Implanting before precast concrete pile body, on precast concrete pile body top, the pile body outside that is positioned at weak soil layer applies one deck Friction-Reducing Coating, negative friction composite foundation pile being produced for reducing weak soil layer. The length that Friction-Reducing Coating applies equals the degree of depth of soft layer. As shown in Figure 5.
Claims (5)
1. a bottom enlarged diameter section composite foundation pile, is characterized in that, comprises precast concrete pile body, and the lower outside of described precast concrete pile body is provided with bored concrete pile; Described bored concrete pile comprises cylindrical circular stake body and the conic tube being connected with stake body top, the equal diameters of the bottom surface diameter of conic tube and stake body, and stake body and conic tube are integrative-structure, and the bus of conic tube and the angle of center line are not more than 12 °.
2. bottom as claimed in claim 1 enlarged diameter section composite foundation pile, is characterized in that, the top of described bored concrete pile, the outside of precast concrete pile body are provided with Friction-Reducing Coating.
3. bottom as claimed in claim 2 enlarged diameter section composite foundation pile, is characterized in that, described precast concrete pile body is pile for prestressed pipe or square pile.
4. bottom as claimed in claim 3 enlarged diameter section composite foundation pile, is characterized in that, described pile for prestressed pipe is PHC pile tube or PRC pile tube.
5. bottom as claimed in claim 2 enlarged diameter section composite foundation pile, is characterized in that, the curing materials of described bored concrete pile is one or more in cement mortar, cement mortar, soil cement, concrete and grouting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520851596.6U CN205259175U (en) | 2015-10-30 | 2015-10-30 | Lower part enlarges compound foundation pile of diameter section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520851596.6U CN205259175U (en) | 2015-10-30 | 2015-10-30 | Lower part enlarges compound foundation pile of diameter section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205259175U true CN205259175U (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201520851596.6U Active CN205259175U (en) | 2015-10-30 | 2015-10-30 | Lower part enlarges compound foundation pile of diameter section |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297717A (en) * | 2015-10-30 | 2016-02-03 | 周同和 | Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile |
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2015
- 2015-10-30 CN CN201520851596.6U patent/CN205259175U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297717A (en) * | 2015-10-30 | 2016-02-03 | 周同和 | Composite foundation pile with lower portion enlarged diameter section and construction method of composite foundation pile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liang Yuansen Inventor after: Song Hongguang Inventor after: Zhang Tianmin Inventor after: Qu Dong Inventor after: Shen Shihong Inventor after: Liang Yunfei Inventor after: Kong Jin Inventor after: Yang Xiangyang Inventor after: Chen Dai Inventor after: Zhao Changle Inventor after: Wang Xiang Inventor after: Xue Songsen Inventor after: Zhou Tonghe Inventor after: Liu Hui Inventor after: Zhang Baogui Inventor after: Wang Huilong Inventor after: Wang Liuyang Inventor after: Gao Mengqi Inventor after: Liu Xiao Inventor before: Zhou Tonghe |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170314 Address after: 450000 Zhengzhou Urban Construction Group Investment Co., Ltd., Huashan Road, Henan, No. 92, Patentee after: Liang Yuansen Patentee after: Song Hongguang Patentee after: Zhang Tianmin Patentee after: Qu Dong Patentee after: Shen Shihong Patentee after: Liang Yunfei Patentee after: Kong Jin Patentee after: Yang Xiangyang Patentee after: Chen Dai Patentee after: Zhao Changle Patentee after: Wang Xiang Patentee after: Xue Songsen Patentee after: Zhou Tonghe Patentee after: Liu Hui Patentee after: Zhang Baogui Patentee after: Wang Huilong Patentee after: Wang Liuyang Patentee after: Gao Mengqi Patentee after: Liu Xiao Address before: 450002 Henan Province, Zhengzhou Cultural Road, room 50, No. 113 Patentee before: Zhou Tonghe |